UN Number Look Up

I am in the midst of updating MSDS, HAZCHEM Labels, chemical labels and etc according to Chemical Classificatiom, Packaging and Labelling Regulation 1997 (CPL) of OSHA.

For the search of UN Number Registry, the following websites are quite useful:

http://www.labelident.com/un-nummern.php?language=en

http://www.unnumber.net/

http://www.cdc.gov/niosh/ershdb/index_un.html

http://www.commonchemistry.org/

I am still searching for HAZCHEM Code for few chemicals :/